Polishing-wheel.



E. D. WOODS.

POLISHING WHEEL.

APPLICATION FILED OCT-Z9, 1914.

1 1 86,058. Patented June 6, 1916.

WITNESS fi Q 65% the annular rim on the spiral spring;

UNITED STATES rATEN orrion.

EDWARD n. woons, or HARTFORD, CONNECTICUT, assrenon TO THE NEW PRODUC S 00., or HARTFORD, CONNECTICUT.

POLIS HING WHEEL.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed October 29, 1914. Serial No. 869,195.

a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Polishing-Wheels; and I do hereby declare the Iollowing to be a full, clear, and exact description of the invention, such aswill enable others slcilled in the art to which it appertains to make and use the same.

My invention relates to an improved pol: ishing wheel having an annular r1m supported on a spiral spring band whereby a resilient action is imparted to the rum under the polishing pressure. v

Referring to the drawings :F1gure 1 represents a side elevation of the 1mproved wheel; Fig. 2, aside elevation -W1tl1 one of the side plates removed showing the interior of the wheel and the manner of suppori mg 1g. 3 is a sidee'levation showing the interior of the wheel with an inflated tube underlying the spiral spring to give an increased resistance to the'polishing pressure and is adapted particularly for heavy-work; Fig. 4 is a broken "detail view of the spiral spring in closed, confined working position; Fig. 5 is a detail 1 confined and fully opened; Fig. -6 is a broken central. sectional the wheel shown in Fig. 3; Fig. 7 is an enlarged central sectional view on line 77 of Fig. 1; Fig. 8 is an enlarged broken central sectional view of the side plates, spring and T-shaped annular rim; and Fig. 9 is a detail reduced side elevation of the T- shaped annular rim.

view of a part of The object of my'invention, before mena reduced portion of the hub as shown in Fig. 7. These plates areheld together by collars (not shown) on the arbor.

dis an annular rim made of felt, duck or duck and rubber or other like material coated with emery or other like abrasive mateview of the spiral spring un-' spiral spring 6, which spring may be' made of any number of coils desired to give the proper resiliency required for any particular wor Tension is first stored up in the spring by coiling inserted and released, the stored up tension w ll cause the spring to hug closely the in side of the rim, Figs. 2, 3, 6, 7 and 8, and thus form a flexible support therefor. The

- rial 5. This rim ismounted directly on the it up into a smaller compass than the inside of the rim, so that, when spring is made of thin spring metal to give it the desired flexibility, available for the desired purpose it must-be capable of being coiled so as to'expand forcibly against the rim. V

The center of the side plates is stiffened by the integral arm portions '7, and their flanged are wide enough to allow the inward move-. ment or depression of that portion of the periphery of the rim brought directly against the article to be polished. The abrasive surface of the T-shape'd rim 4, F1gs. 8 and 9, -being narrower than the abraslve surface of rim shown in the other v1ews, dispenses with the circumferential groove 9.

For grinding,

or very heavy work, the number of coils may be increased or the pneumatic tube 10, Figs. 3 and 6, may be interposed between the spirally coiled spring and to render it and the interior circumferential support 11,

which support may constitute a separatev piece or it may b ary side plate 1 as shown. To provide expeditious means for balancmg the wheel, I employ the adjustable weights 12 mounted on the threaded studs 13, to be secured in any of their adjusted positions by the jam nuts 14. .Any suitable weights that can be readily adjusted and properly located can be used. v I

The high peripheral speed of polishing and grinding wheels renders it impossible to maintain the work against solid wheels without more or less jumping or trembling resulting in a wavy uneven finish on the surface of the work. This tendency to tremble is entirely overcome in a cushion wheel as above described, for instead of jumping, the wheel wi1l-hug the work with increased tee mtegral with the station-.

nacity as the applied power or force is increased. The centrifugal force will have a tendency to spread or open the colls of the spiral spring as the speed of the wheel ncreases and thus maintain the resil ency, fiembility and balance of the wheel under all circumstances; a result that can only be obtained with a spiral spring contacting the entire mner circumference of the rim. While the rim. could be made of sol1d material mounted on the spiral spring, better results can be obtained when the rim is made of duck, felt or other like flexible material combined with the spiral spring, as it Wlll hu the work more closely.

ome users might deem it advisable for a certain class of work to use a solid wheel. improved construction is particularly M n u adllpted to be readily converted mto a. solid wheel by simply making the annular rim of wood and covering the same with leather, and also make the flanged edges 8 fill and fit snugly the grooves 9, which would efiectually prevent the inward depression of the rim. For heavy work, the pneumatic tube may be used in place of the spiral spring.

Having thus described my invention, what I claim is: o

1. A polishing wheel comprlslng an annu lar detachable rim, a spiral spring underlying the rim and in constant elastic contact therewith, and side plates between which the rim is adapted to have a free inward and outward movement.

2. A polishing wheel comprising an annu- Lisa 05s lar detachable rim adapted to carry abrasive material. on its periphery, a spiral spring band underlying the rim and in constant elastic contact with the interior circumferential surface of the rim, side plates freely embracing the edges of the rim and spring band.

3. A polishing wheel comprising an annular detachable rim, a spiral spring band of multiple coils lying against the interior circumferential portion of the rim and in con-- sprin band of multiple coils lyin against the interior circumferential surface of the rim and in constant elastic contact therewith, retaining side plates having a hub, and adjustable weights for balancmg the wheel.

In testimony whereof I afiix my signature in presence of two witnesses.

. EDWARD D. WOODS. Witnesses: V

C. J. Ramon, CHARLES J. CONWAY. 

